Abstract: A barrel opener includes a handle (10); a first projection (20) on a first surface of the handle (10); a second projection (21) parallel to the first projection (20) on the first surface of the handle (10); a first protrusion (22) on one side of the handle (10); a second protrusion (23) parallel to the first protrusion (22) on one side of the handle (10); a prying member (30) on a second surface of the handle (10) opposite the first surface of the handle (10), the prying member (30) having an end hook (300); a fulcrum (31) spaced from the prying member (30) and on the second surface of the handle (10); and a protuberance (40) on one side of the prying member (30) opposing both the first and second protrusions (22, 23). The open is operable to open one of a variety of barrel caps or barrel tops.

Abstract: A pneumatic fan containing a revolving wheel, which has a circumference, first and second stepped fillets at both axial ends thereof, and a rotary main shaft extending from the stepped fillets. The circumference is provided with a plurality of axially extending slots. The pneumatic fan further contains a plurality of impellers which are slidably received by the axially extending slots, each of the axially extending slots having a depth greater than the height of the impellers. Two shaft bearing seats are provided to receive the rotary main shaft at two axial ends thereof. The revolving wheel including the impellers are enclosed in a cylindrical motor seat having an entrance port for receiving air and an exit port for exiting air. The revolving wheel is disposed eccentrically relative to the motor seat, and the motor seat and the rotary main shaft have a point of contact, such that the entrance port and the exit port are disposed equidistantly from, and at opposite sides of, the point of contact.